Metaplasia

Metaplasia METAPLASIA 00:20 - Change in phenotype of cell due to stem cell programming - Change of one type of differenciated cell into another type of stimulus : Chronic irritation TYPES OF METAPLASIA 01:55 Epithelial Squamous Most common type Coloumnar Connective tissue Myositis osificans : Change of muscle due to dystrophic calcification in muscles. Replaced by Muscles Bones SQUAMOUS METAPLASIA 03:45 Any epithelium replaced by squamous cells. Eg: Respiratory System:- Normal epithelium : Gliated Pseudostratified coloumnar Chronic smoking Squamous epithelium

Chronic obstructive pulmonary disease Vit A deficiency Bile dust/Pancreatic duct: Stones Infection Cuboidal Epithelium Squamous epithelium Urinary Bladder : Stones Infection Normal transitional epithelium Squamous epithelium. Endocervix :- Change in pH Human papilloma virus infection Normal coloumnar epithelium Squamous epithelium